3281791788 has 168 divisors, whose sum is σ = 9495931536. Its totient is φ = 983664000.

The previous prime is 3281791783. The next prime is 3281791817. The reversal of 3281791788 is 8871971823.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3281791783) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3239170 + ... + 3240182.

It is an arithmetic number, because the mean of its divisors is an integer number (56523402).

Almost surely, 2^3281791788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3281791788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4747965768).

3281791788 is an abundant number, since it is smaller than the sum of its proper divisors (6214139748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3281791788 is a wasteful number, since it uses less digits than its factorization.

3281791788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147 (or 1130 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 3281791788 is about 57286.9251051232. The cubic root of 3281791788 is about 1486.0622702444.

The spelling of 3281791788 in words is "three billion, two hundred eighty-one million, seven hundred ninety-one thousand, seven hundred eighty-eight".